Gearing.



A. C. JOHNSON.

GEARING.

APPLICATION FILED APR. 13. 1914.

3 16()w Patented Aug. 3, 1915.

4 SHEETS-SHEET I.

A. C. JOHNSON.

GEARING.

APPLICATION FILED APR. I3. 1914.

LMJBO. Patented Aug. 3,1915.

4 SHEETS-SHEET 2.

\\v ITX IGSSES:

v A. (LJOHNSON.

GEARING.

APPUCATON FILED APR-13| 1914. l LQ? Patented Aug. 3, '1915.

4 SHEETS-SHEET 3.

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' A. C. IOHNSON.

GEARING.

APPLICATION FILED APRA 1a, 1914.

L 99 @GQ Patented Aug. 3, 1915.

4 sHEETssHEET 4.

'ITNESSES: I N PINTOR ALFRED C.. JOHNSON, 0F WINTERS, CALIFORNIA, ASSIGNOR T0 WILLIAM J'. BENSON, OF

- SAN JOSE, CALIFORNIA.

GEARING.

specification of Letters Patent.

rmenteaaug. 3, 19.15.

Application filed April 13, 1914. Serial No. 831,580.

To all whom t may concern:

Be it known that I, ALFRED C. JOHNSON, a citizen of the United States, residing at Wintershin the county of yYolo and State of `Califorma, have invented new and useful Improvements in Gearing, of which the fol-` lowing is a specification.

' Thls 1nvent1on relates to improvements 1n a transmissionl mechanism for traction en-v gines or other motor vehicles.

The object of thefinvention is to provide 'a simple, compact, durable transmission mechanism which is so constructed that a drive may be transmitted in either direction to either wheel of a traction engine or other vehicle independently, and which also permits the wheels to be reversed together or driven ahead.

Another object of the invention is to provide a transmission mechanism of the charv acter described which is so constructed that the gears may be lextended and positioned to produce a narrow gear casing, thus permitting the constructiony of a narrow tread machine, or a narrow frame machine with wide treaded wheels.

Further objects will hereinafter appear.

The invention consists in the parts and the construction and combination of parts as hereinafter more fully described and claimed, having reference to the accompanying drawings in Which- Figure 1 is a plan view of the gear casing.

' F ig.` 2 is a vertical, longitudinal section through same on line 2-2, Fig. 1- Fig. 3 is a longitudinal plan section. Fig. 4 is across section on line 4.-4, Fig. 2. Fig. 5 is a cross section on line 5-5, Fig. 2. Fig. 6 is a cross section on line 6-6, Fig. 2. Fig. 7 is a cross section on line 7-7, Fig. 2. Fig. 8 is a plan view of a traction engine, showing theapplication of the transmission mechanism.

Referring to the drawings, A indicates a casing in which is journaled `as at 2,'3 and 4 a main drive or power shaft 5. This eX- tends through the casing from end to end,

and is connected with thel engine B of the' tractor through the engine clutch indicated at 6. Slightly elevated and oli'set with relation to the main drive shaft is a pair of in-- ends in bearing` 13 carried by the standard indicated at 14. Keyed to shaft 7 on one side of the member 9 is a bevel pinion 15, and slmllarly secured to the shaft on the op- -posite side of bearing 9 is a spur gear 16.

Intermeshing with said spur gear is a second spur gear 17, which is formed integrally with a sleeve 18, loosely mounted upon the Surrounding said main drive shaft 5. sleeve, and keyed to same is a second sleeve 19, and formed integrally with said sleeve,- -or otherwise secured to same, is a bevel pinion 20. Facing the bevel pinion indicated at 20 is a second bevel pinion 21 which is connected to the main drive shaft as at 22, and mclosing bevel pinions 20 and 21 is an annular casing 23 to which is secured a suitable number of intermediate pinions 24 which are so positioned as to intermesh with pin-l ions 20 and 21. The intermediate pinions are free to revolve upon stud bolts 25, and the casing in which they are mounted is turnably mounted on the drive shaft, as indicated at 26' and on the outside of the sleeve indicated. at 19. It is, however, possible to lock. the annular casing against revolution through the means of shoe 27 and band`28, the ends of which are secured to a block 29,

slidably mounted in an extension 30, formed on the side of the main casing. Shoe 27 is mounted on the outer end of an externally threaded bolt 21 which also passes through block 29,and the outer end of the bolt which. extends throughthe casing, is provided withA a lever 32 by which it may be turned. Move- 'ment of the lever in one direction or the other will either force the shoe in an inward direction and pull the ends of the brake band outwardly in the direction of arrows a to lock the casing against revolving movement, or the shoe will move .away from the casing while the. block to which the brakeband is secured moves inwardly, thus releasing the casing and permitting this to revolve. i

One end of the casing is provided with an annular extension 33, on the interior surface of which is formed a clutch face, and slidably mounted `on a feather 34 on the main drive shaft is a vcone clutch 35, which is adapted to be thrown into engagement with the clutch extension 33 formed on the casing. Clutch 35 is normally thrown into engagement'with the co-acting member 33 through the means of coil spring 36, and can only be thrown out ofengagement with same by rocking a forked lever 37 through the link connection, indicated at 88. Movement fromfthe main drive shaft 5 may be transmitted through clutch 35 and casing 23 to revolve spur gear 17, which is loosely mounted on the main drive shaft in the same direction, or movement may be transmitted from the main drive shaft 5 when the casing is locked against movement through the means of shoe 27 and brake band 28 throughpinion 20 to which spur gear 17 is secured through means of sleeves 18 and 19to revolve spur -gear 17 in an opposite direction to that of the revolution of the main drive shaft. 1t can thus be seen that movement may be transmitted through the main driving shaft to spur gear 17 to drive this in unison with same, or in an opposite direction. Gears 16 and 15 being direct con-- nected to same may consequently be reversed or driven ahead as they case may be. Intermeshing with pinion 15 is a bevel master gear 44 which is secured to one end of a divided driving shaft, indicated at 39 and 40. To the opposite end of shaft 3.9 is secured a spur gear 41, and intermeshing with said spur gear is an internal gear 42 which is suitably secured to the inner periphery or spokes of the tractor wheel, indicated at 43. From the following description it can easily be seen that the movement of the main drive shaft may be transmitted in either one direction or another through gear 17 with connected gears 15 and 16 which mesh with the bevel master gear 44. This will in turn transmit through shaft 39, spur pinion 41 and internal gear 42 with connected tractor wheel to revolve this in one direction or another.

Secured to shaft 8 is a pair of gears 15a and 16a, and intermeshing with gear 16a is a spur gear 17a through which movement is transmitted from the main drive shaft through. clutch 35a, when a direct drive is desired, and through which a reverse movement may be transmitted through pinion 21a with connected intermediates 24a and pinion 2Oa which are controlled by the brake-band 28a and shoe in the manner previously described. The movement of pinion 15a is in turn transmitted through the master bevel indicated at,44a, shaft 40, spur pinion 41a and connected internal gear to tractor wheel 43a. i

Referring to the drawings and theprevious description of the mechanism it can be y seen that movement may be transmitted-'-n sible to reverse the wheels together or to drive ahead. When a direct drive is transmitted to both wheels it is accomplished by releasing the brake-bands with connected shoes and throwing clutches 35 and 35a into engagement with the clutch extension on the respective casing. Movement will then be transmitted from the main drive shaft through casing 23a gear 17a with connected gears 15a and 16a which in turn are connected with the master bevel 44a and pinion 41 to drive the tractor wheel indicated at 43a ahead. Movement. is similarly transmitted from the main drive shaft through clutch 35 and the casing 23a and gear 17 with con-l nected gears 15 and 16.to master bevel 44 through which power in turn is transmittedl through spur 41 to drive the tractor wheel indicated at 43- ahead. 1f it is desired to turn a sharp corner a head drive may be transmitted to one wheel while a reverse is transmitted to the opposite wheel,or if it is desired to back up it is accomplished by 'releasing clutches 35 and 35a and locking casings 23 'and 23a against revolution through the medium of brake-bands 28 and 28a. Movement is then transmitted through gears 2l and 21a through intermediates 24 and 24a to bevel pinions 20 and 20a, which in turn transmit through the connected sleeves 18 and` 19, and 1 8a and 19a and gears 17 and 17a to gears 16 and 15, and 16a and 15a. Thereverse movement of pinions 15 and 15a is transmitted through the respective master bevel gears with connected shafts and pinions to drive the tractor Wheels in a reverse direction.

A transmission mechanism constructed as here shown is particularly adapted for traction engines which employ a narrow frame with wide tread traction wheels, or to a traction engine in which it is desirable to secure as narrow a tread as possible. The end for end arrangement of uthe reversing gears within the annular housings 23 and 23a permits a long, narrow transmission mechanism whlch 1s particularly adapted to the narrow tread or narrow frame machine. It 1s substantial and durable in construction and less I claim and desire to secure by Letters Patent is: y

1. A transmission mechanism comprising a power shaft, a driven shaft at right angles to the power shaft. a third shaft parallel to the power shaft, a gear on the power shaft, a gear on the driven shaft, a gear on the third shaft meshing'with the gear on the driven shaft, a second gear on the third shaft meshing with the gear on y y1,149,160 Y the power shaft, and means for driving the gear on the power shaft, from the latter, in either direction. f

2. A transmission mechanism comprising a power shaft, va driven shaft at right angles to the power shaft, an 'intermediate shaft, gears on `the intermediate shaft, a gear on the power shaft meshing with one of the gears on the intermediate shaft, al gear on the power shaft,V and means caI-,

ried by the casing and including an element meshing wlth said second gear on the power shaft for reversing the direction of the first gear on the latter.

4. A transmission mechanism comprising a casing, a power shaft extendingllongitudinally thereof, a driven shaft at right angl s to the power shaft, an intermediate sha parallel to the power shaft, means for connecting the intermediate shaft with the power shaft and the driven shaft, said means including agear on the power shaft,` and means for .driving the gear on the power shaft in either direction from the latter.

5. A `transmission mechanism comprising a caslng, a power shaft extendlng longltudlnally of the casing, a driven shaft at right angles to the power shaft, means` for connecting the power shaft with the driven A ,shaft and comprising a plurality of gears carried by a shaft-extending parallel to the power shaft and a gear carried on the power shaft', means rotating with the power shaft to cause the' gear thereon to rotate in one direction, and means carried by the casing to hold said means in part against rotation with the power shaft to cause the gear on the power shaft to rotate in the opposite dif rection.

6. In a transmission mechanism, spaced shafts, a gear fixed on each shaft, a loose gear on one shaft operatively connected to the gear of the other shaft, and a mechanism constantly connecting the loose gear to the fixed gear of the same shaft and including means forl vdriving the driven of said shafts in either direction. l

7. In a ltransmission mechanlsm, spaced shafts, a gear fixed on each shaft, Ya loose gear on one shaft operatively connected to the gear of the other shaft, a mechanismvoperatively connecting the loose gear to the fixed gear of the 'same shaft and includinga p casing turnably mounted on the vlast shaft and adapted when held against rotation to ef` yfect a reversal of movement of the driven of said shafts, and means for'holding the casing against movement.

Ingtestimony whereof I have hereunto set .my hand in-the\ presence of' two subscribing witnesses. ALFRED C. JOHNSON. AWitnesses:

L. A. Comines, T. W.'ANDERSON. 

